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US2591749A
(en)
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Amplitude modulation system
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US2374000A
(en)
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Phase modulator
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US2682640A
(en)
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Arrangement for modulating electric carrier wave oscillations
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PL33848B1
(https=)
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US2351368A
(en)
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Reactance tube
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US2339608A
(en)
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Frequency modulation system
|
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US2551802A
(en)
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Phase modulator
|
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US2600873A
(en)
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Balanced modulator
|
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US2027975A
(en)
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Frequency modulation
|
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GB584465A
(en)
|
|
An improved apparatus for varying or modulating the frequency of crystal controlled circuits
|
|
US1984156A
(en)
|
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Modulation system
|
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GB625268A
(en)
|
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Improvements in circuits for modulating the frequency or the phase of electrical oscillations
|
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US1800372A
(en)
|
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Frequency-translating circuit
|
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US2331821A
(en)
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Frequency modulation
|
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US2341655A
(en)
|
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Variable reactance
|
|
US2211939A
(en)
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Modulation system
|
|
US2324282A
(en)
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Wave length modulation
|
|
US2443754A
(en)
|
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Modulator arrangement for carrier wave telegraphy and telephony
|
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US3237129A
(en)
|
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Push-pull modulator circuit with means to vary the output level of the carrier and sidebands
|
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US2278063A
(en)
|
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Frequency modulation system
|
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GB637094A
(en)
|
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Improvements in or relating to circuit-arrangements for acting upon the natural frequency of oscillatory circuits
|
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US2492185A
(en)
|
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Oscillator
|
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US2841769A
(en)
|
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Frequency modulated oscillation generators
|
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US2050067A
(en)
|
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Phase modulation
|
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SU62090A1
(ru)
|
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Визуальный индикатор настройки приёмника
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